As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD BANG WHEN GEAR RETRACTION ATTEMPTED. NLG WOULD NOT LOCK UP. GOT THREE GREENS WHEN HANDLE PLACED BACK TO DOWN. FOUND NLG RETRACT ACTUATOR BROKEN AND ROD END PULLED OUT OF ACTUATOR. ROD END HAD FALLEN BACK AND MOVEMENT OF GEAR CAUSED PENETRATION THROUGH WHEEL WELL BULKHEAD. REPLACED ACTUATOR AND REPAIRED DAMAGE